Aircraft



Patented June 3, 192d.

entree erases OEEUND HUNT, F DETBE'IT, MICHIGAN, ASSIGNOR '10 PACKARD MOTOR GAR CQMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

a AIRCRAFT.

Application filed November 10, 1917. Serial No. 201,255.

Toallwhom itmay. concern:

Be it known that 1, ORMoNo E. HUNT, a citizen of theUnited States, and resident I of Detroit, Wayne County, State of Michlan, have invented certain new and useful mprovements in Aircraft, of .which the following is a specification.

This invention relates to airplanes and particularly to the arrangement of the exhaust pipes of the motor relative to the airplane parts.

In the very rapid movement of an airplane through the air thin air pockets are created at various points and particularly 1 just above the rear edge of the wings. In

the present invention this fact is taken advantage of to assist in withdrawing the exhaust gases from the motor exhaust pipes.

From the above it ma beobserved that one of the objects of t e invention is to provide an airplane in which the motor exhaust pipes lead to thin air pockets caused by the movement of the airplane.

Other objects of the invention will appear from the following description taken in connection with the drawings which form a part of this specification, and in which:

Fig. 1 is a perspective View of an airplane embodying this invention, parts being cut so away to better illustrate the'construction; Fig. 2 is a fragmentary view of one of the airplane wings shown in Fig. 1' and illusatrating another form of the invention; an r 85 Fig. 3 is a viewsimilar to Fig. 2 illustrating a third form of the invention.

Referring to the drawings, 10 represents the fuselage or body of an airplane, 11 is the propeller; and 12 represents the tail 9 tins of the craft. The landing gear is illustrated at 13, and a pair of wings 14 are shown exterfding laterally from the sides of the fuselage -Part of the wall of the fuselage is broken I away at 15 to show the arrangement of the motor'16 therein. Thismotor is usually of the hydrocarbon ty e and as shown is a V, t pe motor having our cylinders in each of the two blocks. In this motor, each of the cylinder blocks has connected. to it an exhaust pipe 17 which carries ofl the exhaust ses om'the c linders. It will be undermood that the er the exhaust of these gases into the atmosphere the better will be the operation of the motor, and if they could be exhausted into a vacuum the results would be better than when they are exhausted directly into the atmosphere.

It will be understood also that 1 by the rapid forward movement of an airplane, such as herein shown, a thin air pocket or partial vacuum is created along the upper surface of the wings and particularly adjacent the rear edges of the Wings. These thin air pockets are taken advantage of in the present invention by leading the exhaust pipes 17 directly to them so that'the suction created by them will tend to draw the exhaust gases from the pipes. shown, the exhaust pipe 17 from one block of cylinders leads to a point 18 adjacent the rear edge of one of the airplane wings I the airplane wing 14 as shown at 19, and

a slit or elongated opening 20 is formed in part 19 ofthe exhaust pipe to thereby expose a greatedlength of opening to the thin air pocket and increase the suction.

A somewhat similar arrangement is shown in Fig. 3 except that here the part 19 of the exhaust pipe is provided with a series of perforations or openings 21 which furnish communication between the interior of the exhaust pipe and the thin air pocket.

Other forms may be used without departing from the spirit or scope of the invention.

Having thus described my invention,-

of the airplane, of an exhaust pipe for the motor leading to adjacent the rear edge of said wing and exhausting into the thin air pocket caused by said wing as the airplane moves forwardly.

ture.

' @RMONDE. HUNT.

In testimony whereof afix. my signa- 

